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  <title>Output all remaining data on a file pointer</title>
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  <div id="layout-content"><div id="splfileobject.fpassthru" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">SplFileObject::fpassthru</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.1.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">SplFileObject::fpassthru</span> &mdash; <span class="dc-title">Output all remaining data on a file pointer</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-splfileobject.fpassthru-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>SplFileObject::fpassthru</strong></span>(): <span class="type">int</span></div>

  <p class="para rdfs-comment">
   Reads to EOF on the given file pointer from the current position and
   writes the results to the output buffer.
  </p>
  <p class="para">
   You may need to call <span class="methodname"><a href="splfileobject.rewind.html" class="methodname">SplFileObject::rewind()</a></span> to reset the file
   pointer to the beginning of the file if you have already written data
   to the file.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-splfileobject.fpassthru-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-splfileobject.fpassthru-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the number of characters read from <code class="parameter">handle</code>
   and passed through to the output.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-splfileobject.fpassthru-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3708">
    <p><strong>示例 #1 <span class="methodname"><strong>SplFileObject::fpassthru()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br /></span><span style="color: #FF8000">//&nbsp;Open&nbsp;the&nbsp;file&nbsp;in&nbsp;binary&nbsp;mode<br /></span><span style="color: #0000BB">$file&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">SplFileObject</span><span style="color: #007700">(</span><span style="color: #DD0000">"./img/ok.png"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"rb"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Send&nbsp;the&nbsp;right&nbsp;headers<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-Type:&nbsp;image/png"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-Length:&nbsp;"&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$file</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getSize</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">//&nbsp;Dump&nbsp;the&nbsp;picture&nbsp;and&nbsp;end&nbsp;script<br /></span><span style="color: #0000BB">$file</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">fpassthru</span><span style="color: #007700">();<br />exit;<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-splfileobject.fpassthru-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.fpassthru.html" class="function" rel="rdfs-seeAlso">fpassthru()</a> - 输出文件指针处的所有剩余数据</span></li>
   </ul>
  </p>
 </div>


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